P0466 Code: EVAP Purge Flow Sensor Circuit Range/Performance
🟢 Low severity · drivable
Safe to drive — the purge flow reading is off, but it won't affect how the car runs.
What P0466 means
The purge flow sensor is working, but its reading doesn't match what the computer expects during purging. A blocked hose, a bad sensor, or a faulty purge valve can cause this.
Symptoms
- Check engine light is on
- Possible faint fuel smell
- Usually no driving symptoms
Common causes
- most common: Faulty purge flow sensor
- common: Clogged or collapsed purge hose
- common: Faulty purge valve
- less common: Wiring issue at the sensor
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Check the purge hoses for blockages | Yes | $5–20 |
| Replace the purge flow sensor | Yes | $40–150 |
| Test and replace the purge valve if it's faulty | Yes | $30–120 |
Frequently asked questions
Can I drive with a P0466 code?
Yes. The purge flow reading is off, but it won't affect how the car drives.
What does P0466 mean?
The purge flow sensor reading doesn't match what the computer expects, often due to a bad sensor, blocked hose, or faulty purge valve.
How much does it cost to fix P0466?
$5–20 to clear a blocked hose, $40–150 for a new sensor, or $30–120 for a new purge valve.
Related codes
P0465
P0465 Code: EVAP Purge Flow Sensor Circuit
P0467P0467 Code: EVAP Purge Flow Sensor Circuit Low
P0468P0468 Code: EVAP Purge Flow Sensor Circuit High
Related guide: How to Reset a Check Engine Light →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.